Survey of variation of heavy metals in Shell of Saccostrea cucullata during monsoon phenomenon in Iranian coasts of the Oman Sea

Document Type : Animal environment

Authors

1 University of Zabol, Hamoon International Wetland Research Institute, Iran

2 Khorramshahr University of Marine Science and Technology, Faculty of Marine and Oceanic Sciences, Iran

3 Iranian National Institute for Oceanography, Research Station of the Gulf of Oman and the Indian Ocean, Iran

Abstract

This research was conducted in 2010 with purpose to evaluate the effect of monsoon phenomenon on variation of metals concentration including Cd, Cu, Ni, Pb and Zn in shell of oyster Saccostrea cucullata from intertidal zone of Chabahar coasts (along the Gwatr to Pozm). For this purpose, the Gwatr, Beris, Ramin, Chabahar, Tis and Pozm stations were selected. Samples of oysters were collected from the each station in the preemonsoon, monsoon and postmonsoon seasons (including May, August and November respectively) during low tide. After preparation of samples, heavy metal concentration was determined by using the atomic absorption spectrophotometer method. The average concentration of Cd in premonsoon, monsoon and post monsoon was determined 0.41, 1.36 and 1.90, Cu 1.56, 1.058 and 0.46, Ni 2.49, 11.55 and 10.48, Pb 0.47, 0.90 and 1.02 and Zn 7.65, 6.86 and 4.47 µg/g dw respectively. Increases of Cd concentration during preemonsoon and post Monsoon may probably be as a result of the upwelling currents and increase of phytoplankton productivities that can be content of Cd. Increase of Ni and Pb concentration from preemonsoon to post Monsoon seasons could be due to the monsoon activity and the change of these elements concentration in surrounding areas. Therefore, this project determined; Monsoon phenomenon can be an important factor to change or fluctuate heavy metals concentration in shell of oyster in selected area of the Oman Sea.

Keywords

Journal of Animal Environment
Volume 4, Issue 4
February 2013
Pages 15-24

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